Review on Evaporative Cooling Systems

Okafor, Victor Chijioke

doi:10.15580/gjsetr.2017.1.031817038

Cited by 8 publications

(2 citation statements)

References 31 publications

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“…Evaporative cooling technologies have been subject to previous review articles. These provide a general approach (Amer et al, 2015; Okafor, 2017), sometimes focusing on one technology in particular (Pacak & Worek, 2021; H. Yang et al, 2021), or on research in a certain region (Xuan et al, 2012), their integration in buildings (Cuce & Riffat, 2016; Emdadi et al, 2019), a particular application (Misra & Ghosh, 2018; Odesola & Onyebuchi, 2009; Ulpiani, 2019), or the use of alternative materials (Emdadi et al, 2016; S. He et al, 2015; Kumar et al, 2020). The main factors influencing DEC operation (Tejero‐González & Franco‐Salas, 2021) and the possibilities of enhancing evaporative cooling (Y. Yang et al, 2019) have also been the target of existing reviews.…”

Section: Introductionmentioning

confidence: 99%

“…1.1 | Objectives, methodology, and structure of the review Evaporative cooling technologies have been subject to previous review articles. These provide a general approach (Amer et al, 2015;Okafor, 2017), sometimes focusing on one technology in particular (Pacak & Worek, 2021;H. Yang et al, 2021), or on research in a certain region (Xuan et al, 2012), their integration in buildings (Cuce & Riffat, 2016;Emdadi et al, 2019), a particular application (Misra & Ghosh, 2018;Odesola & Onyebuchi, 2009;Ulpiani, 2019), or the use of alternative materials (Emdadi et al, 2016;S.…”

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confidence: 99%

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Direct evaporative cooling from wetted surfaces: Challenges for a clean air conditioning solution

Tejero‐González

Franco-Salas

2021

WIREs Energy & Environment

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Evaporative cooling has a major role to play in fighting climate change and in achieving a low‐carbon economy. As it helps to reduce energy demand for air conditioning, it is gaining attention in terms of improving energy efficiency in buildings. Evaporative cooling from wetted media can enhance water–air contact, thereby improving heat and mass transfer further and avoiding aerosols. Wetted media are commonly called evaporative cooling pads and are widely used in greenhouses, intensive livestock farming, and industrial facilities. However, a deep understanding of evaporative cooling pad performance can enhance their application to indoor occupied spaces such as residential or commercial cooling, or in hybrid air conditioning systems. Most studies analyze pad performance mainly in terms of pressure drop and saturation effectiveness. However, some studies propose alternative cooling efficiency parameters and others provide insights into key aspects such as power requirements and the coefficient of performance, water consumption, risk of water entrainment, material decay, and air quality, as well as the effect of water temperature and salinity, solar radiation, or wind speed. Existing results on these less studied performance issues are reviewed, and we identify the gaps in the literature in addition to highlighting the main challenges encountered, in an effort to guide future researchers in the field and enhance the application of direct evaporative cooling. This article is categorized under: Energy Efficiency > Systems and Infrastructure Energy Systems Analysis > Systems and Infrastructure

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Direct evaporative cooling from wetted surfaces: Challenges for a clean air conditioning solution

Tejero‐González

Franco-Salas

2021

WIREs Energy & Environment

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Socio-economic aspect of evaporative cooler structure

Olaniyan

Wike

Adetunji

et al. 2023

Engineering Principles, Modeling and Economics of Evaporative Coolers

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Performance evaluation of an indirect air cooling system combined with evaporative cooling

Sibanda

Workneh

2020

Heliyon

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This study developed an indirect air-cooling combined with evaporative cooling (IAC þ EC) system for temporary storage of fruit and vegetables (FV) to improve the shelf life of fresh produce under hot and humid climatic conditions. The aim of the study was to investigate the effect of IAC þ EC in providing optimum storage environment of temperature and relative humidity (RH) for the tomato fruit compared to storage under ambient conditions. The IAC þ EC system had a 53-m 3 storage chamber able to store 3.8 tons of tomatoes. Solar energy during the day and a battery bank facility at night powered the cooling system. The structure was constructed and assembled at Ukulinga research center in Pietermaritzburg. The performance of the IAC þ EC was evaluated based on the temperature and the RH measured hourly from 05h00-22h00 daily during a period of 28 days. Temperature and RH were measured in the psychometric unit, various positions in the storage chamber and at ambient conditions. There were significant variations (P < 0.001) in temperature and RH between storage and ambient conditions. The temperature inside the storage chamber was on average 7 C-16 C lower while the average RH was 13%-41% higher than ambient conditions. Temperature and RH at the exhaust end of the IAC þ EC storage chamber were 16.40 C and 88.9% compared to 30.9 C and 47.6% under ambient conditions. Such conditions can enhance the shelf life of FV of moderate respiration rates. Inside the storage chamber, temperature was 15.7 C-16.4 C while the RH was 89.6%-93.8% depending on location. The cooler efficiency varied from 88.04% to 95.6%. The IAC þ EC system performed at the same level as evaporative cooling under dry and arid conditions. The results in this study are evidence that IAC þ EC system can provide optimum storage conditions for FV as well as being a low-cost technology utilizable in hot and sub-humid to humid areas in sub-Saharan Africa.

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Review on Evaporative Cooling Systems

Cited by 8 publications

References 31 publications

Direct evaporative cooling from wetted surfaces: Challenges for a clean air conditioning solution

Direct evaporative cooling from wetted surfaces: Challenges for a clean air conditioning solution

Socio-economic aspect of evaporative cooler structure

Performance evaluation of an indirect air cooling system combined with evaporative cooling

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